Key Features:
14 0 7,669
Compare side-by-side Aerospace & Astrodynamics• MCP Alternatives Guide
Best Alternatives to Open Ephemeris
Looking for an alternative to Open Ephemeris? Whether you need a different runtime environment, custom authentication support, or alternative API integrations in the Aerospace & Astrodynamics ecosystem, we have cataloged and compared the top alternative MCP servers below.
Target Reference Server
Open Ephemeris Overview
open-ephemeris connects MCP clients to the Open Ephemeris REST API for computed astrology and astronomy data based on NASA JPL DE440. It provides interactive natal, transit, Moon, Human Design, Vedic, and BaZi visualizations alongside structured JSON tools for charts, aspects, forecasts, eclipses, lunar phases, and timing searches. Use it when an agent needs calculated planetary positions, date-specific ephemeris results, or specialized astrology chart formats rather than free-form interpretation alone. The hosted Streamable HTTP endpoint supports remote clients, while an npm package provides a stdio configuration.
Primary Use Cases for Open Ephemeris:
- Generate an interactive natal or synastry chart
- Find exact dates for planetary transits and eclipses
- Retrieve astrology and Human Design data as JSON
- Compare Vedic, BaZi, and Western chart systems
Specification Matrix: Open Ephemeris vs Alternatives
Direct comparison of key metrics, runtimes, authentication methods, and community popularity.
| Server Name | Runtime | Auth | Pricing | GitHub Stars | Downloads | Action |
|---|---|---|---|---|---|---|
| npx | — | — | 5 | — | Current | |
| npx | API key | Freemium | 7,669 | — | Compare → | |
| npx | No auth required | Free | 91,487 | — | Compare → | |
| npx | No auth required | Free | 832 | — | Compare → | |
| npx | API key | Free | 52,712 | — | Compare → | |
| npx | No auth required | Free | 4,402 | — | Compare → | |
| npx | No auth required | Free | 5,159 | — | Compare → | |
| npx | No auth required | Free | 10 | — | Compare → | |
| npx | API key | Bring your own API key (usage-based cost) | 28,266 | — | Compare → | |
| npx | API key | Paid | 6,193 | 1 | Compare → | |
| npx | OAuth | Bring your own API key (usage-based cost) | 1,142 | — | Compare → | |
| npx | No auth required | Free | 6,281 | — | Compare → | |
| npx | No auth required | Free | 3,701 | — | Compare → |
Detailed Evaluation of Open Ephemeris Alternatives
Key Features:
9 0 91,487
Compare side-by-side Key Features:
9 0 832
Compare side-by-side Key Features:
14 0 52,712
Compare side-by-side Key Features:
10 0 4,402
Compare side-by-side Key Features:
10 0 5,159
Compare side-by-side Key Features:
11 0 10
Compare side-by-side Key Features:
10 0 28,266
Compare side-by-side Key Features:
16 1 6,193
Compare side-by-side Key Features:
9 0 1,142
Compare side-by-side Key Features:
10 0 6,281
Compare side-by-side Key Features:
11 0 3,701
Compare side-by-side Frequently Asked Questions: Open Ephemeris Alternatives
The top-rated alternatives to Open Ephemeris in the Aerospace & Astrodynamics category include Firecrawl MCP Server, Filesystem, Next Devtools MCP. These servers offer complementary or alternative capabilities depending on your deployment stack and authentication requirements.
Open Ephemeris and its alternatives vary by runtime requirement (Node.js/npx, Python/uvx, Docker, or remote HTTP/SSE endpoints). Check the specification comparison table above to verify command requirements before installing.
It varies by server. Pricing, auth and license are declared by each maintainer and shown in the comparison table where provided — a dash means nothing was declared, so check that project's own site before assuming it's free.
Click the "Compare side-by-side →" button on any alternative card to see an in-depth comparison matrix covering feature lists, stars, npm downloads, install configurations, and schema specifications.